Summary & Overview

CPT 95012: Exhaled Nitric Oxide Test for Airway Inflammation

CPT code 95012 denotes measurement of fractional exhaled nitric oxide (FeNO), a noninvasive diagnostic test that quantifies airway inflammation commonly used in evaluation and management of asthma and other inflammatory airway conditions. Nationally, FeNO testing matters for targeted disease management, medication monitoring, and objective assessment of airway eosinophilic inflammation, supporting clinical decisions about anti-inflammatory therapy.

Key payers covered in the analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise review of clinical context for FeNO testing, the typical sites where the test is performed, and payer coverage considerations. The publication outlines benchmarks and utilization patterns where available, recent policy or coding updates relevant to FeNO measurement, and practical billing considerations such as common modifiers and service line placement. Where input data is not provided, the report notes "Data not available in the input." This national-level summary is intended to inform clinicians, practice managers, and coding professionals about the purpose of CPT code 95012, typical clinical use, and the payer landscape that affects reimbursement and access.

AetnaBlue Cross Blue ShieldCigna HealthUnitedHealthcareMedicare95012CPTFeNOexhaled-nitric-oxideasthmapulmonary-diagnosticsairway-inflammationrespiratory-testing

Billing Code Overview

CPT code 95012 describes a clinical test in which a patient exhales into a nitric oxide monitoring system to measure fractional exhaled nitric oxide (FeNO). This test is used to assess airway inflammation in patients suspected to have or diagnosed with inflammatory airway diseases such as bronchial asthma.

Service type: Diagnostic respiratory function testing — exhaled nitric oxide measurement

Typical site of service: Outpatient clinic or pulmonary specialty office; may also be performed in ambulatory care settings or specialty testing laboratories

Clinical & Coding Specifications

Clinical Context

A 12-year-old patient presents to a pediatric pulmonology clinic with recurrent wheeze, cough, and exercise-induced shortness of breath despite intermittent inhaled bronchodilator use. The provider orders an exhaled nitric oxide (FeNO) measurement to assess airway eosinophilic inflammation and guide anti-inflammatory therapy decisions. The patient is screened for recent bronchodilator or corticosteroid use and instructed to avoid heavy exercise and eating for 1 hour prior. In the clinic, a respiratory therapist or trained technician explains the procedure, verifies identity and indications, and obtains repeated single-breath exhalations into a calibrated nitric oxide monitoring system per device instructions and ATS/ERS guidelines. The provider reviews FeNO results with the family, interprets levels in the context of symptoms and spirometry, and documents the test, device used, results, and clinical interpretation in the medical record. Typical sites of service include outpatient pulmonary clinics, allergy/immunology offices, pediatric clinics, and hospital outpatient departments. The service type is diagnostic respiratory function testing focused on airway inflammation assessment.

Coding Specifications

Modifier	Description	When to Use
`25`	Significant, separately identifiable E/M service by the same physician on the same day of the procedure	Use when a distinct evaluation and management visit is provided on the same day as `95012` and appropriately documented.
`26`	Professional component	Use if billing only for the professional interpretation or reporting when the monitoring device is owned by another entity.
`TC`	Technical component	Use when billing only for the technical component (equipment, technician) of the test.
`59`	Distinct procedural service	Use when `95012` is performed on the same day as an unrelated procedure and documentation supports distinctness.
`52`	Reduced services	Use if the test could not be completed fully and a reduced service was performed, with documentation of limitations.
`53`	Discontinued procedure	Use if the test was started but terminated due to patient intolerance or unsafe conditions.
`95`	Synchronous telemedicine service rendered via real-time interactive audio and video	Use if FeNO testing is supervised remotely via approved telehealth arrangements and payer allows remote supervision.
`76`	Repeat procedure by same physician (note: not in provided list)	Data not available in the input.
`59` (duplicate removed)	Data not available in the input.	Data not available in the input.
`GC`	Service performed by resident under TEACHING physician	Use when the test is performed by a resident in a teaching setting and the post-graduate education modifier is required by the payer.
`QK`	Medical direction of two, three, or four qualified individuals by the physician (anesthesia-related)	Rarely applicable; include only if billing rules for supervision or direction apply per payer policy.

Taxonomy Code	Specialty	Notes
Data not available in the input.	Pulmonology	Pulmonologists commonly order and interpret FeNO testing.
Data not available in the input.	Allergy & Immunology	Allergists use FeNO to evaluate allergic asthma and guide therapy.
Data not available in the input.	Pediatric Pulmonology	Pediatric specialists perform FeNO testing in children with suspected asthma.
Data not available in the input.	Respiratory Therapy	Respiratory therapists commonly perform the technical component under supervision.

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
`J45.909`	Unspecified asthma, uncomplicated	Asthma is the primary condition for which FeNO testing is used to assess airway eosinophilic inflammation and guide anti-inflammatory therapy.
`J45.901`	Unspecified asthma with (acute) exacerbation	FeNO can help assess inflammatory status during exacerbations and inform corticosteroid use.
`J45.22`	Mild intermittent asthma, uncomplicated	FeNO may assist in identifying patients with eosinophilic inflammation even with mild symptoms.
`J98.01`	Acute bronchospasm	FeNO measurement may be used as part of the evaluation for reactive airways contributing to bronchospasm.
`R06.02`	Shortness of breath	Symptom code that often prompts objective testing including FeNO when asthma or airway inflammation is suspected.

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`95012`	Measurement of nitric oxide in exhaled air (FeNO) using a nitric oxide monitoring system	Primary procedure to assess airway inflammation; used to guide diagnosis and management of asthma and other eosinophilic airway diseases.
`94010`	Spirometry, including graphic record, total and timed vital capacity, expiratory flow rate measurement(s), with or without maximal voluntary ventilation	Performed before or after FeNO to assess airflow obstruction and bronchodilator response.
`94060`	Bronchoconstriction responsiveness, including spirometry pre- and post-protocol (methacholine challenge)	Used when additional objective bronchial hyperresponsiveness testing is required after FeNO evaluation.
`94760`	Noninvasive testing of lung volumes and capacities (e.g., body plethysmography)	Used for detailed pulmonary function assessment if obstruction or restriction is suspected.
`94729`	Carbon monoxide diffusion capacity (DLCO)	Performed when gas transfer assessment is clinically indicated alongside airway inflammation testing.